Letter scale



FIG. 1 is a left rear perspective view of a letter scale showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a left rear perspective view of another embodiment of my new design of FIG. 1;

FIG. 8 is a right side elevational view thereof;

FIG. 9 is a top plan view thereof;

FIG. 10 is a front elevational view thereof;

FIG. 11 is a bottom plan view thereof; and

FIG. 12 is a rear elevational view thereof. 

An ornamental design for a letter scale, substantially as shown and described. 